Momentous achievements

Horse racing Triple Crown. Times achieved: 11. Last achieved by Affirmed in 1978. Affirmed, with jockey Steve Cauthen aboard, crosses the finish line to win the 104th running of the Kentucky Derby in Louisville, Ky.

There are many difficult things to do in sports and I'll Have Another is trying to accomplish one of them by winning the Belmont Stakes to complete the Triple Crown. Only 11 horses have achieved the Triple Crown. Here are more athletes and their momentous achievements.